Quick-acting broach-locking device



Oct. 22, 1929.

F. J. LAPolNTE QUICK ACTING BROAGH LOCKING DEVICE Filed April 2l, 1927 ZIJ @Mw/Wn w w wWf/ a w iwf f M 1 J u -5 www M, @mw d w -w. 74W. WNIQW. @Ham 0 0,Z am A Z d5 3 1l v v wm" I .wu a m e mm; i w n mw /W/ W w i Patented Oct. 22, 1929 UNITED STATES PATENT OFFICE QUICK-ACTING BROACI-I-LOCKING DEVICE Application led April 21,

This invention relates to locking devices for connecting the pulling end of a broach to the reciprocating carriage of a breaching machine and has t'or its object the provision of a simple device ol' this character which will be quick acting.

This object is attained by the mechanism illustrated in the accompanying drawing.

For the purpose of illustrating the invenio tion, one preterred form thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the vari ous instrumentalities of which the inveni tion consists can be variously arranged and organized, and the invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described except as required by the scope of the appended claims.

In the drawings:

Figure 1 represents a'section oi' a device embodying the principles of the present invention, the cutting plane being on line 1, 1,

on Fig. 2. f

Figure 2 represents a transverse section of the same on line 2, 2, on Fig. l.'

Figure 3 represents a section of said device with the cam removed and the springs on the connecting rods disposed on the outer ends of said rods, the cutting plane being on line 3, 3, on Fig. 4.

Figure 4represents a section ot the same on line 4, 4, en Fig. 3, and i Figure 5 represents a side elevation of the pulling end of a broach. j

Similar characters indicate like parts throughout the several figures of the drawings.

In the drawings 10 is a block provided with a threaded shank 11 by which said block 10 may be secured to the usual reciprocating carriage ot a breaching machine.

This block 10 is provided with a socket 12 alined with the axis of the shank 11 and adapted to receive the pulling end 13 of a broaching tool of usual construction.

The end 13 is cone-shaped at 14 to facilitat 50 the insertion ot' said end into the socket 12,.

1927. Serial No. 185,474.

the mouth of which is flaring as at 15 for the same purpose.

With a round breaching tool the end 13 is provided with an annular groove 16 indicated in Fig, 1 but when a broaching tool is to be used which is not round the end 13 thereof is provided with two oppositely disposed slots 17, the bottoms of which are Hat and parallel as shown in Figs. 5 and 6.

Formed in the periphery of the block 10 are two grooves 18 oppositely disposed and in each of which is disposed a jaw 19.

Extending through the opposite ends ot the jaws 19 and the block 10 are connecting rods 20, the lower ends of which have heads 2OX f bearing against the under jaw 19 as shown in Figs. 1 and 2.

The upper ends of the rods 2O extend through holes in the opposite ends of a cylindrical member 21 flattened at 22 to make seats for the adjustable nuts 23 threaded to said rods, these rods also having threaded thereto lock nuts 24.

The member 21 midway of its length is pro vided with a concave groove 25 with which co- H acts a spring pressed ball 26 carried by a cam 27 having an opening therein through which said member 21 extends.

The ball 26 in the groove 25 prevents any lateral movement of the cam 27 relatively to the member 21.

The cam 27 is provided with an actuating handle 28 and a flat face 29. V

Surrounding the rods 20 are springs 30 with their outer ends dis Josed in depressions 31 in the opposite ends o the jaws 19. Y

Vhen the cam 27 is moved about the axis of the member 21 until the flat it'ace 29 thereof is in contact with the upper `face of the block 10, the springs 30 will separate the jaws 19 90 enter the annular groove 16 and securely lock the tool in the block 10.

The block is flat sided to receive a wrench when the block is being screwed into the reciprocating carriage of the broaching machine.

The-tool 13 may-be quickly removed from the blo'ckflO when the cam 27 is-'zigaininov'ed into a position with the ilat face 29 in Contact with the fiat upper face of the block 10.

When a broacli'ing 'tool 'is use'd 'provided with the flat faced slots --17 .-tlie ,cam-2 be dispensed with by removing the springs 30 from a position between therjaws 19.*and Ydisposing said springs around the rods 2O between the ru-prper .Pjaw 1:9fai1tl :the cylindrical member 21, as shown in Figs. Bandfl. WVlren so Vdisposedfthe springs Will l'orc'ethe ,jaws "19 "towards :each "other 'with spdrtions thereof ip'rojecting int'the socket. 12.

insertedTinto `the vsocket 'i12 tlie *inclined 'sur- V'laces "141". thereof. coming into Contact with the aws 19 williforc'esaidljaws 'apart Auntil thef's'lots 'liregister with saidjaws-at which time l`'the-springs f3() will gtorce the ejaws 4into the slots and lock th'etoolih position.

This *is dfconsiderable ximportancen's the ljaws '19 coactin-g with'the :flat fiiaeed :slots 17 alW-iays register `tli'e toolfinthesamefpsi- 'tion 'foreach-operation wh'ich'fisveryessential where a liatsided breach is bt-iingfused.A

`When-'itis desired to remove'the'broaching teelt-it maybe tu'rnedfintb tliep'ositionfintlicated fin "Liftliereby "zigainsepaiating. 'the fjaws '19:andip'rniittingfthequiekremoval ot said itool.

This makes a very simple device for'lockinrg' breaching Ttools 4to 4ithe reciprocating f carfriageot' a .brcachingy machinefandwvhih I may be E utilizedinl connection Withf either fa -round lbrcaching=too1 `with E anfannularf groove: in fits pulling end or a tool not roundiandfhrrving "Hat sdedfslotsin itspullmgfend.

It isibelie'vedl'thattheiopera'tion. an'd many advantages ofthe invention ivill'fbe I'readily understood without forth-erf;description.

E1. block provided fat? one fend with' at ta'hing means and fat the otlier'4 end witlrafeylindric'al socket, lsaid block fhfavin'g' oppositely disposed f grooves *extending .transversely of Iand communicating with said socket-g ,-jaws movable in Said=groovestoward vand 'from each' other ;.r"ods extending through said block and the opposite ends of said-jawsand havj ing headsfenfga'ging one jaw :a' member conneetingthe oppositeends of'lsai'd rods i neans for. adjustingv A.said connecting melinber lengthwise ofsaid rods; means coacting with .SeidI iaWSfffOr se-renting fthe-'His 'antifa am f for nioviiigfs'aid jaws' 'twai'dv'each other with l portions" thereof disposedv transversely' in said :"socket.

2. A block provided at one end with attaching means and at the other end with a cylindrical socket, said block having oppositely disposed grooves extending transversely ot and communicating with. said socket; jaws iitted to and movable in said grooves toward yand from eachother; rods extendingr through 'saidblock and the opposite ends of said jaws; a cylindrical member through which the opposite ends of said rods extend; springs i'or "separating said jaws; and a cani mounted upoirsaid cylindrical member tor movin g said jaws toward each other with portions thereo'ldisposedtransversely in said socket.

3. A block provided at one end with attachingnieans and a'tithe other end with a "cylindricalsocketgsaidblockhaving oppositelydisposed'grooves extending transverselyoi` and comn'iunicating with said socket; jaws fitted toand movable insaid grooves 'toward and from each other; rods extend ing` through saidbloek and the opposite ends of said. jaws; a cylindrical 'member through which the/opj'iositeendso'f said rod`s`extemhsaid member havinganannular groove niidw y thereof; springs tor separating 'said jaws; a cam mounted upon said cylindrical member for moving saldija'ws to'wa d eachother with por- `tions thereof disposed transversely in .said socketgfan-daspringipressed ball in .said cam `reacting with 'said groove.

4. Ablockprovided atone end with attachiiig'nleans and'at the other end with acylindrical socket, said block having oppositelv disposed grooves extending transverselvv of and communicating with vsaid socket; jaws 'tted to andmovable in said grooves toward and Afrom" each other girods e'xtendin g through :saidlbloc'ktlie' opposite ends ot said jaws; a cylindrical member through whichthe onpositeientlsot'said rods extend; springs vtor separating said-jaws; a'cam mounted upon *said cylindrical memberfor moving said aws towardeachother with portionsthereot disposed transversely in said socket; and means preventing movement of said cam lengthwise of said cylindrical member.

"5. `A bloe'k provided :it one endwith means for attachment to a movable member and having `afcylindiiical todl-receiving socket :it its opposite end; two spring-pressed jaws with portions thereof adaptedto extend into and transverselyf 'said socket; a pair of 'rods .extending through said block on whichhoth fjaws -are lire'elyiiiovable; and means outside 'oneita-ce o t'saidblock and mounted upoir said rods V'for'moving said jaws'against the tension of the springs.

6. A block provided at one end with an in- 'tegral threaded shank for vattachmentto a movable member 'andhavmg a tool-receiving socket at the opposite end, said block having Aopposit'ely disposed grooves extending trom vits'outer boundary transversely ot and communicating with said socket; jaws movable in said grooves and adapted to project into said socket; rods extending through said block and the opposite ends of said jaws; springs for moving said jaws apart; and means supported on said rods outside said block for moving said jaws toward each other with portions thereof extending into said socket.

7. A block provided at one end with attaching means and at the other end having a cylindrical tool-receiving socket, said block having oppositely disposed `grooves extending from its outer opposite faces transversely of and communicating with said socket; rods extending through said block and freely movable therein jaws on said rods movable in said grooves toward and from each other; means limiting the separation of said jaws; and other means carried by said rods and opposite an outer face of said block coacting with one jaw for moving both jaws toward each other with portions thereof projecting into said socket.

8. A block provided at one end with attaching means and at the other end with a tool-receiving socket; two movable jaws carried thereby normally outside the tool-receiving socket and extending transversely thereof; means extending through said block for retaining said jaws in parallelism during their movement whereby the inward move- .ment of one jaw will effect a positive movement of the other jaw inwardly; springs for separating said jaws; and means outside one face of said block coacting with one jaw for moving both jaws toward each other with portions projecting into said socket.

9. A block provided at one end with attaching means and at the other end with a cylindrical tool-receiving socket; two movable jaws carried thereby and extending transversely of said socket; parallel rods extending through and freely movable endwise in said block and the opposite ends of said aws; springs surrounding said rods and interposed between and adapted to separate said jaws; and cam mechanism carried by said rods and coacting with one jaw for compressing said springs and moving both jaws into position with portions thereof'projecting into said socket.

10. A block provided at one end with a threaded shank for attachment to a movable member and having a tool-receiving socket at the opposite end in axial alinement with said shank7 said block having oppositely disposed fiat faced grooves extending from opposite outer faces thereof transversely of and communicating with said socket; fiat faced jaws movable in said grooves and adapted to project into said socket; rods extending through said block and the opposite ends of said jaws and freely movable endwise therein; springs surrounding said rods for moving each jaw in one direction; and means coacting with one jaw for moving said jaws in the opposite direction.

l1. A block provided at one end with attaching means and at the other end having a cylindrical tool-receiving socket, said block having oppositely disposed flat faced grooves extending from opposite outer faces thereof transversely of and communicatingwith said socket; fiat faced jaws fitting said grooves and movable toward and from each other; rods extending through said block and the opposite ends of said jaws and freely movable endwise therein; resilient means interposed between said jaws for separating them; means on said rods limiting the separation of said jaws; and other means outside one face of said block and supported by said rods for moving said jaws toward each other withI portions thereof projecting into said socket.

12. A block provided at one end with attaching means and at the other end with a cylindrical tool-receiving socket, said block having oppositely disposed grooves extending transversely of and communicating with said socket; jaws movable in said grooves toward and from each other; rods extending through said block and the opposite ends of said jaws and having heads engaging one jaw a member connecting the opposite ends of said rods which project beyond one face of said block; means for adjusting said connect-` ing member lengthwise of said rods; means coacting with said aws for separating them; and other means supported by and movable on said connecting member for moving said jaws toward each other with portions thereof disposed transversely in said socket.

13. A block provided at one end with attaching means and at the other end with a cylindrical tool-receiving socket; said block having oppositely disposed grooves extending from its opposite outer faces transversely of and communicating with said socket; jaws fitted to and movable in said grooves toward and from each other; positive connections between said jaws whereby movement of one jaw in one direction will cause movement of the other jaw in the opposite direction; springs for separating said jaws; and means outside said block and coacting with the outer face of one jaw for moving both jaws toward each other with portions thereof disposed transversely in said socket. 

